Apparatus to hold and bent



W. E EVERITT.

if APPARATQSD 1p HOLD AND BEND SPRINGS.

[PFQEATM nuzo FEB. s. 1919.

1,323,971; Patented Dec. 2,191

"WALTER EDWARD EVERITT, OF SEATTLE, WASHINGTON.

APPARA'IUS -TO I -{OLD AND BEND 'SPB INGS.

Specification of Letters Patent.

; Patented. Dec. 2,1919.

Application filediFebnuary 8, .1919. .ScrialgIIo. 275,87 8.

' To all whom z'tmay concern:

Be it .knownithat I, AVLTER1EDWAI1D;EV nnrr'r, a citizen of the United States, res1ding at Seattle,in the county of King and State of Washington, "have invented certain new and usefullmprovements in Apparatus to Hold and Bend Springs; .and l do hereby declarethe following to;be a full, clear, and exact description of theiinvention such as will enable othersskilledin theart to'which it appertains to make and use-the same.

This invention relates to apparatus for bending spring leaves and particularly to bending spring leaves of the type ,nsed 1n vehicular construction. 7

It is i the obj ect of the. present invention to provide an apparatus of this type which is s mple, practicable, easily operated, and by which; spring leaves of various proportions and sizes'may readily be bentto the desired form and it isan important object of the present invention to. provide for the difierential curvature of one. ofthe leaf springs with relation to another sothat the maximuni eliiciency of the leaves can be utilized when they are assembled into the leaf -or bolster organization.

Another object of the inventienis toprovide ,means for varying the pressure of the forming or; pressure roll and holding it permanently at the 'desiredpressure during the operation.

Another object ofethe invention is to provide for theme of the machine with spring leaves of different types as for instance, those having apertures intheircenters or those merely having punch marks. 7

With these and other objects in view which will readily Fbe made. amanifest-lto those versed in the art, the inventionconsists of the construction the, combination, and in details and arrangements .of the parts as more particularly described in the following. specification relative ;to the em-.

leaves in theol-ampingroll, the leaves being in cross section.

Fig.8 is a detailed sectional viewi of the upperportionofthe apparatus.

:Eigs. 4- and 5 are side ,elevational views of thetliroat plate for the bracket arms.

7 Fig.6 i-sa detailed view of the clamp for embracing adjacent ends of' the leaves which are, shown in section.

thelower portion 0f-the-post 1. The upper end'oftheuswinging lever 3 is provided with a handle, 8 bywhich it may be manipulated tokand fro from the upper end of the'post. Just1=below:the handle 8,;there is a rocker shaft 9 having a pawl or click 10 designed to :swing .down into engagement with the .tQot-hedqupper edge o'falever 11 which is pivoted at 12 on; the upper end ofthe swinginguarm 3. The-rock shaft '9 is provided with .operating lever 13 by which the pawl 10 can, beodisengaged from thetoothed upper edge of the lever 11, which lever has a downwardly extending portion 14 through which is passed a ,plll 1-5, :upon which is mountedapair of links 16, connected by a pin ,17 to the upper .end of a. slide 18, arranged between the side arms of the lever :3. The pins ,15 and l'lare of sufficient length to form seats for the ends of a spring 19 which surrounds thelinks 16 the'lower ends of which are slotted as clearly shown in Fig. 3st 16. so as-to provide for the compression of the spring 19 by means of the lever 11.

:V'Vithin the slide 18 there is vmounted a pressure ;roller '20 designed to engage and operate ,upon a spring 21 when it is applied to a-master spring 22 or other form the ends of which are suitably supported upon bracket arms and 2 1, which are laterally adjustable withrespect to the post or means of wedge-keys 27 attached by chains 28 to the post to prevent their being misplaced. One of the wedge-keys 27 is pro vided with a pin 29 designed to be passed through an aperture 23 in one of the side arms of the lever 3 and to engage a comlock the arm '3 invertical position. i

The upwardly extending arm of the b1facket'24 is provided with a cross head 31 having an upwardly extending threaded portion 32 on which there is pivotally mounted a wedge-shaped hub or looking cam 33 having a lever 34 extendingfrom the side thereof and bywhich thecam 33 can be'turned so that itsthi'n portion as shown inl ig 6 can be brought over the upper end of the cross head or seat 31 to permit the insertion of the spring leaf and master forms 21 and 22, after which the lever 34 can be swung so as to turn the thick portion of the locking end 33 into binding engagement upon the inserted ends of the spring leaf and form. The opposite edges of the leaf and form are supportedby means of a swiveledstop or rest 35 shown as in the shape of a U-shaped piece which may be pivoted upon thelateral extension 36 of the cross head 31 to provide for adaptation of the clamping device to leaves of various width. The upperend of the bracket 23 is provided with a pin or rest 40 upon which is pivotally mounted side stop 41 through one end of which and the opposite end 42 of the arm '23 there may be passed a locking key or fastener 43 which is connected by a chain 44 to the arm 23 to prevent loss of the key.

The side stop 41 is laterally adjustableon the seat or rod 40in a manner similar to the member 35 shown; in Fig. 6, to provide for adaptation of therests or supports to springs of difi'erent widths.

Some times leaf sprlngs are'provided at their central portions with apertures to receive a centering device and again they are provided only with punched seats and in orderto adapt the present device to operate upon either form of spring leaves there is shown in Fig. 8 a reversible jack pin 45 with a rather elongated point 46 for use with springs which have only punched seatsand the opposite end of the jack pin 45 is provided with ashort taperedpoint 47 for use with spring leaves which are apertured.

One of the important'featuies of the present invention is to provide an apparatus whereby the curvature ofthe master spring may be varied so as to give differential curvature to the different leaves of a pile and to that end the present apparatus includes an adjustable supporting member upon which the jack pin 45 may be arranged. 'This is shown clearly as comprising in Fig. 3 a lever 48, one arm 49 of which is provided with a seat to receive the pin 45, the upper end of which is guided in abracket or guide portion 50 having an aperture at the upper 7 portion and a slot in the side arm through .which theadjacent end 49 of the lever 48' ,p swings. The guide 50 is mounted upon the "upper end of the stationary column or post plementary aperture in the post so as to the lever arm 48 is'mounted. The outerf arm of the lever 48'is provided with a series of apertures 53 in any of which may be mounted a'pivot pin 54 in the'upper end'of connecting rod'55 the lower end of which is pivotally connected at' 56 to foot pedal 57 pivoted -at'58 to one side of the post 1. The V pedal 57'and the lever 53 normally rock upward so as to hold the seat 49 in lowermost positionby any suitable means, here shown as comprising a spring 59 connecting the lever'57 tothe main post or column 1 For the purpose of preventing the swinging-arm 3. from teetering or swaying after it passes the post or column 1 the latter is provided on each side with a suitable form of support or guide 60.

-In-operationof the devicethe clamp 33 on the bracket arm or support'24is opened, as

is also the locking pin43 on the bracket 23 "and the master leaf or former 22 insertedbe- 'neath the roller 20 which isfheld in an elevated position by means of a spring 61 'connected to the'lever 11,-then the spring leaf 21 to be formed or shaped is placed upon the master leaf 22 and'one-end of it is-elamped by the wedge member 33, the leaves 21 and 22 being centered'witlr respect to eachother 19 compressed and theroller 20 held'against the upper leaf 21. The arm 3 is then swung i away-from the clamp 33 by means of'the operator grasping the handle 8 and [this movement bends the upper spring 21 to'the rovided thereforebetween theside master 22, the free endof thespring leaf 21 I being forced down toward the rod or-support 40 after which it may be-keyed or locked into position by the pin' 43. *Thie lever 3 is then manipulated'a sufiicientfnumber of times to shape or, form the leaf 21, approximately to the master 22, after which in order, to give a differential curve to the two members the operator presses downthe pedal 57 so as to lift the lever seat 4:9and carry the ack pin 45 upward increasing the deflection of the master 22 and also the leaf spring 21 superposed thereon after which the operator swings the lever 8 to and fro to press the spring to the desiredforin. Therefore when the operator has released pressure on the pedal 57, the jack pin 45 is forced down by the resiliency of the master spring 22 after which the leaf spring 21 may be released from the clamp and holders and it will be found to have been given a curvature difi'erent from that found in the mas ter 22.

hat I claim is:

1. In an apparatus of the character set forth in the specification, a supporting bracket having an rip-standing arm. with a cross piece forming a seat, and a wedge-llke disk for clamping superposed elements to the seat, and an adjustable side rest, for the lements, opposite to the clamp.

2. In an apparatus for shaping leaves of laminated springs, means for centering the leaf and a master; means for holding the superposed elements during the process of shaping, and a shaping means comprising a lever having a slide carrying a presser roll, the lever shiftable from end to end of the elements, means on the lever for holding the roll with desired pressure against the work comprising a pivoted lever carried by said first mentioned lever and pivotally connected to a link having a slotted end, a pin secured to said slide and engaging the slotted end of said link, and a compression spring intermediate said pivoted lever and said pin.

3. In an apparatus for shaping leaves of laminated springs, means for centering the leaf and a master; means for holding the superposed elements during the process of shaping, and a shaping means comprising a lever having a slide carrying a presser roll, the lever shiftable from end to end of the elements, means on the lever for holding the roll with desired pressure against the work comprising a pivoted lev'er carried by said first mentioned lever and pivotally connected to a link having a slotted end, a pin secured to said slide and engaging the slotted end of said link, a compression spring intermediate said pivoted lever and said pin and means for locking said pivoted lever.

4. In an apparatus for shaping leaves of laminated springs, means for centering the leaf and a master; means for holding the superposed elements during the process of shaping, and a shaping means comprising a lever having a slide carrying a presser roll, the lever shift-able from end-to end of the elements, means onthe lever for holding the roll with desired pressure against the work, con'iprising a pivoted lever carried by said first mentioned ,lever and having a downwardlyextending portion, a linkhaving a slotted end, a pin connecting said link and downwardly extending portion, a pin connecting said slide and said link, one of said pins engaging the slot in said link anda spring intermediatesaid pins.

5. In an apparatus for shaping leaves of laminated springs, means for centering the leaf and a master; means for holding the superposed elements during the process of shaping, and a shaping means comprising a lever having a slide carrying a presser roll, and lever shiftable from end to end of the elements, means on the lever for holding the roll with desired pressure against the Work comprising a pivoted lever carried by said first mentioned lever and having a downwardly extending portion, a link having a slotted end, a pin connecting said lin: and downwardlyextending portion, a pin connecting said slide and said link,'one of said pins engaging the slot in said link, a compression spring intermediate said pins, and means for locking said pivoted lever comprising a pawl on said first mentioned lever engaging a rack on said'pivoted lever.

6. In an apparatus for shaping leaves of laminated springs, a support, means for cen tering the leaf and a master carried by said support; means for holding the superposed elements during the process of shaping, also carried by said support and a shaping means comprising a lever pivoted to said support and having a slidecarrying a presser roll, the lever shiftable from end to end of the elements, and self-locking means for holding the roll with desired pressure against the work, the last named means comprising a pivoted lever a spring intermediate said lever and slide, and a latch for said pivoted lever.

7. In an apparatusfor shaping leaves of laminated springs, a support, means for centering the leaf and a master carried by said support; means for holding the superposed elements during the process of shaping, also carried by said support, and a shaping means comprising a lever adjustably pivoted to said support and having a slide carrying a presser roll, the lever shiftable from end to end of the elements, a guide for said lever carried by said support and self-locking means for holding the roll with desired pressure against the work, the last named means comprising a pivoted lever, a spring intermediate said lever and slide and a latch for said pivoted lever.

8. In an apparatus for shaping leaves of laminated springs; .a support, means for holding the superposed elements carried by said support, shaping means movable longitudinally of the supported elements, and means for centering the superposed elements and varying the curvature of the master leaf or teinplet to differentiate the leaves of a set from each other at any time during the operation of shaping the leaves, comprising a lever pivoted intermediate its ends to :said support, a depression in one end of said lever, a pm slldably supported by said frame and having its lower end engaging the desecured to said treadle and the other adjust- 10' ably connected to theother end of said lever. In testimony whereof I al'fix my signature.

' WALTER'EDWARD EVER-1T1. 

